emscripten: Implement SDL_OpenURL

CMakeLists.txt

@@ -1170,6 +1170,11 @@ elseif(EMSCRIPTEN)
   # Hide noisy warnings that intend to aid mostly during initial stages of porting a new
   # project. Uncomment at will for verbose cross-compiling -I/../ path info.
   target_compile_options(sdl-build-options INTERFACE "-Wno-warn-absolute-paths")
+
+  file(GLOB EMSRIPTEN_MISC_SOURCES ${SDL2_SOURCE_DIR}/src/misc/emscripten/*.c)
+  set(SOURCE_FILES ${SOURCE_FILES} ${EMSRIPTEN_MISC_SOURCES})
+  set(HAVE_SDL_MISC TRUE)
+
   if(SDL_AUDIO)
     set(SDL_AUDIO_DRIVER_EMSCRIPTEN 1)
     file(GLOB EM_AUDIO_SOURCES ${SDL2_SOURCE_DIR}/src/audio/emscripten/*.c)

configure

@@ -26618,6 +26618,9 @@ $as_echo "#define SDL_AUDIO_DRIVER_EMSCRIPTEN 1" >>confdefs.h
         CheckClockGettime
         CheckEmscriptenGLES
 
+        SOURCES="$SOURCES $srcdir/src/misc/emscripten/*.c"
+        have_misc=yes
+
          # Set up files for the power library
         if test x$enable_power = xyes; then
 

configure.ac

@@ -4339,6 +4339,9 @@ dnl BeOS support removed after SDL 2.0.1. Haiku still works.  --ryan.
         CheckClockGettime
         CheckEmscriptenGLES
 
+        SOURCES="$SOURCES $srcdir/src/misc/emscripten/*.c"
+        have_misc=yes
+
          # Set up files for the power library
         if test x$enable_power = xyes; then
             AC_DEFINE(SDL_POWER_EMSCRIPTEN, 1, [ ])

src/misc/emscripten/SDL_sysurl.c

@@ -0,0 +1,37 @@
+/*
+  Simple DirectMedia Layer
+  Copyright (C) 1997-2022 Sam Lantinga <slouken@libsdl.org>
+
+  This software is provided 'as-is', without any express or implied
+  warranty.  In no event will the authors be held liable for any damages
+  arising from the use of this software.
+
+  Permission is granted to anyone to use this software for any purpose,
+  including commercial applications, and to alter it and redistribute it
+  freely, subject to the following restrictions:
+
+  1. The origin of this software must not be misrepresented; you must not
+     claim that you wrote the original software. If you use this software
+     in a product, an acknowledgment in the product documentation would be
+     appreciated but is not required.
+  2. Altered source versions must be plainly marked as such, and must not be
+     misrepresented as being the original software.
+  3. This notice may not be removed or altered from any source distribution.
+*/
+
+#include "../SDL_sysurl.h"
+
+#include <emscripten/emscripten.h>
+
+int
+SDL_SYS_OpenURL(const char *url)
+{
+    EM_ASM({
+        window.open(UTF8ToString($0), "_blank");
+    }, url);
+
+    return 0;
+}
+
+/* vi: set ts=4 sw=4 expandtab: */
+